conf_api.c revision 337982 
1/* conf_api.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59/* Part of the code in here was originally in conf.c, which is now removed */
60
61#ifndef CONF_DEBUG
62# undef NDEBUG                  /* avoid conflicting definitions */
63# define NDEBUG
64#endif
65
66#include <assert.h>
67#include <stdlib.h>
68#include <string.h>
69#include <openssl/conf.h>
70#include <openssl/conf_api.h>
71#include "e_os.h"
72
73static void value_free_hash_doall_arg(CONF_VALUE *a,
74                                      LHASH_OF(CONF_VALUE) *conf);
75static void value_free_stack_doall(CONF_VALUE *a);
76static IMPLEMENT_LHASH_DOALL_ARG_FN(value_free_hash, CONF_VALUE,
77                                    LHASH_OF(CONF_VALUE))
78static IMPLEMENT_LHASH_DOALL_FN(value_free_stack, CONF_VALUE)
79
80/* Up until OpenSSL 0.9.5a, this was get_section */
81CONF_VALUE *_CONF_get_section(const CONF *conf, const char *section)
82{
83    CONF_VALUE *v, vv;
84
85    if ((conf == NULL) || (section == NULL))
86        return (NULL);
87    vv.name = NULL;
88    vv.section = (char *)section;
89    v = lh_CONF_VALUE_retrieve(conf->data, &vv);
90    return (v);
91}
92
93/* Up until OpenSSL 0.9.5a, this was CONF_get_section */
94STACK_OF(CONF_VALUE) *_CONF_get_section_values(const CONF *conf,
95                                               const char *section)
96{
97    CONF_VALUE *v;
98
99    v = _CONF_get_section(conf, section);
100    if (v != NULL)
101        return ((STACK_OF(CONF_VALUE) *)v->value);
102    else
103        return (NULL);
104}
105
106int _CONF_add_string(CONF *conf, CONF_VALUE *section, CONF_VALUE *value)
107{
108    CONF_VALUE *v = NULL;
109    STACK_OF(CONF_VALUE) *ts;
110
111    ts = (STACK_OF(CONF_VALUE) *)section->value;
112
113    value->section = section->section;
114    if (!sk_CONF_VALUE_push(ts, value)) {
115        return 0;
116    }
117
118    v = lh_CONF_VALUE_insert(conf->data, value);
119    if (v != NULL) {
120        (void)sk_CONF_VALUE_delete_ptr(ts, v);
121        OPENSSL_free(v->name);
122        OPENSSL_free(v->value);
123        OPENSSL_free(v);
124    }
125    return 1;
126}
127
128char *_CONF_get_string(const CONF *conf, const char *section,
129                       const char *name)
130{
131    CONF_VALUE *v, vv;
132    char *p;
133
134    if (name == NULL)
135        return (NULL);
136    if (conf != NULL) {
137        if (section != NULL) {
138            vv.name = (char *)name;
139            vv.section = (char *)section;
140            v = lh_CONF_VALUE_retrieve(conf->data, &vv);
141            if (v != NULL)
142                return (v->value);
143            if (strcmp(section, "ENV") == 0) {
144                p = getenv(name);
145                if (p != NULL)
146                    return (p);
147            }
148        }
149        vv.section = "default";
150        vv.name = (char *)name;
151        v = lh_CONF_VALUE_retrieve(conf->data, &vv);
152        if (v != NULL)
153            return (v->value);
154        else
155            return (NULL);
156    } else
157        return (getenv(name));
158}
159
160#if 0                           /* There's no way to provide error checking
161                                 * with this function, so force implementors
162                                 * of the higher levels to get a string and
163                                 * read the number themselves. */
164long _CONF_get_number(CONF *conf, char *section, char *name)
165{
166    char *str;
167    long ret = 0;
168
169    str = _CONF_get_string(conf, section, name);
170    if (str == NULL)
171        return (0);
172    for (;;) {
173        if (conf->meth->is_number(conf, *str))
174            ret = ret * 10 + conf->meth->to_int(conf, *str);
175        else
176            return (ret);
177        str++;
178    }
179}
180#endif
181
182static unsigned long conf_value_hash(const CONF_VALUE *v)
183{
184    return (lh_strhash(v->section) << 2) ^ lh_strhash(v->name);
185}
186
187static IMPLEMENT_LHASH_HASH_FN(conf_value, CONF_VALUE)
188
189static int conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b)
190{
191    int i;
192
193    if (a->section != b->section) {
194        i = strcmp(a->section, b->section);
195        if (i)
196            return (i);
197    }
198
199    if ((a->name != NULL) && (b->name != NULL)) {
200        i = strcmp(a->name, b->name);
201        return (i);
202    } else if (a->name == b->name)
203        return (0);
204    else
205        return ((a->name == NULL) ? -1 : 1);
206}
207
208static IMPLEMENT_LHASH_COMP_FN(conf_value, CONF_VALUE)
209
210int _CONF_new_data(CONF *conf)
211{
212    if (conf == NULL) {
213        return 0;
214    }
215    if (conf->data == NULL)
216        if ((conf->data = lh_CONF_VALUE_new()) == NULL) {
217            return 0;
218        }
219    return 1;
220}
221
222void _CONF_free_data(CONF *conf)
223{
224    if (conf == NULL || conf->data == NULL)
225        return;
226
227    lh_CONF_VALUE_down_load(conf->data) = 0; /* evil thing to make * sure the
228                                              * 'OPENSSL_free()' works as *
229                                              * expected */
230    lh_CONF_VALUE_doall_arg(conf->data,
231                            LHASH_DOALL_ARG_FN(value_free_hash),
232                            LHASH_OF(CONF_VALUE), conf->data);
233
234    /*
235     * We now have only 'section' entries in the hash table. Due to problems
236     * with
237     */
238
239    lh_CONF_VALUE_doall(conf->data, LHASH_DOALL_FN(value_free_stack));
240    lh_CONF_VALUE_free(conf->data);
241}
242
243static void value_free_hash_doall_arg(CONF_VALUE *a,
244                                      LHASH_OF(CONF_VALUE) *conf)
245{
246    if (a->name != NULL)
247        (void)lh_CONF_VALUE_delete(conf, a);
248}
249
250static void value_free_stack_doall(CONF_VALUE *a)
251{
252    CONF_VALUE *vv;
253    STACK_OF(CONF_VALUE) *sk;
254    int i;
255
256    if (a->name != NULL)
257        return;
258
259    sk = (STACK_OF(CONF_VALUE) *)a->value;
260    for (i = sk_CONF_VALUE_num(sk) - 1; i >= 0; i--) {
261        vv = sk_CONF_VALUE_value(sk, i);
262        OPENSSL_free(vv->value);
263        OPENSSL_free(vv->name);
264        OPENSSL_free(vv);
265    }
266    if (sk != NULL)
267        sk_CONF_VALUE_free(sk);
268    OPENSSL_free(a->section);
269    OPENSSL_free(a);
270}
271
272/* Up until OpenSSL 0.9.5a, this was new_section */
273CONF_VALUE *_CONF_new_section(CONF *conf, const char *section)
274{
275    STACK_OF(CONF_VALUE) *sk = NULL;
276    int ok = 0, i;
277    CONF_VALUE *v = NULL, *vv;
278
279    if ((sk = sk_CONF_VALUE_new_null()) == NULL)
280        goto err;
281    if ((v = OPENSSL_malloc(sizeof(CONF_VALUE))) == NULL)
282        goto err;
283    i = strlen(section) + 1;
284    if ((v->section = OPENSSL_malloc(i)) == NULL)
285        goto err;
286
287    memcpy(v->section, section, i);
288    v->name = NULL;
289    v->value = (char *)sk;
290
291    vv = lh_CONF_VALUE_insert(conf->data, v);
292    OPENSSL_assert(vv == NULL);
293    if (lh_CONF_VALUE_error(conf->data) > 0)
294        goto err;
295    ok = 1;
296 err:
297    if (!ok) {
298        if (sk != NULL)
299            sk_CONF_VALUE_free(sk);
300        if (v != NULL)
301            OPENSSL_free(v);
302        v = NULL;
303    }
304    return (v);
305}
306
307IMPLEMENT_STACK_OF(CONF_VALUE)
308